Tank hydraulic

 

(57) Abstract:

The tank is designed for storing the working fluid of the hydraulic systems of various machines. The tank contains two separate sealed by a partition section, adjustable booster and check valve, air filter-breather, oil filter, suction holes, drain and drainage inputs, with the first section of the dewatering tank through check valve connected to the suction cavities additional pump and pump control circuit, through the air filter-breather with the atmosphere through an adjustable retaining valve with cavity fluid and air through the bolt with an air cavity of the second section, the second section baffles-dampers, has built a sealed cavity of the main filter, chamber connected with the main volume of the second section through the check valve with diffuser flow, connected across is equipped with a shutter tube with suction cavity of the main pump through the check valves with pressure cavities of the primary and secondary pumps and through the release valve - injection cavities of the cylinders. Drain drainage of the hydraulic system connected to the first section of the tank through an outlet port PORTRA. The technical result - the reduction of losses of the working fluid. 8 C.p. f-crystals, 11 ill.

The invention relates to a hydraulic reservoirs and can be used in volumetric hydraulic actuators of various machines and technological equipment, for example, hydraulic excavators.

Analogs of the invention can be tanks hydraulic excavators Japanese firms KATO and KOMATSU. On excavators HD 1SOOGYS firm KATO (source - instruction manual and parts list catalog excavator) and in some models manufactured by KOMATSU PC220, PC220LS SERIAL N21708, RS-3, PC220LC-3 SERIAL N21992 (source PARTS BOOK TOM6 P02060030-06) and RS-5 CUSTOM PC-400-5 CUSTOM SERIAL N20001 and up (source SHOP MANUAL was LUCKY 1994 SEBM0207C503K) are the hydraulic reservoirs, consisting of one section and having a supply system booster (excess) pressure air. These systems provide a retaining pressure require installation of the compressor, a pressure reducing valve, safety valve, receiver, air filter with desiccant and network interconnections. While retaining pressure acts on all circuits of the hydraulic system, including the discharge control circuit and drainage that causes the need for hydraulics special designs. EA-4225 or as the closest, "Tank of the hydraulic system" Patent 2105205 from 20 February 1998. The specified tank working fluid of the hydraulic system contains two separate sealed by a partition section, adjustable booster and check valve, air filter-breather, oil filter, suction holes, drain and drainage inlets.

In the tank at the specified patent has an airtight cap as the cavity of an air cushion that is used to create a retaining pressure cleaning is drained into the tank fluid is provided separately installed filter and difficult way to replenish the air volume as its dissolution when in contact with oil.

The objective of the invention to improve operation and increase the resources of the main pump hydraulic system, reduction of losses of the working fluid in the process of conducting routine repairs, simplifying the design and improving the ease of maintenance in operational conditions.

The problem is solved in that tank working fluid of the hydraulic system contains two separate sealed by a partition section, adjustable booster and check valve, air filter-breather, oil filter, suction overstaying cavities additional pump and pump control circuit, through the air filter-breather with the atmosphere through an adjustable retaining valve with cavity fluid and air through the bolt with an air cavity of the second section, the second section baffles-dampers, has built a sealed cavity of the main filter chamber connected to the main volume of the second section through the check valve with diffuser flow, connected across is equipped with a shutter tube with suction cavity of the main pump through check valves with pressure cavities of the primary and secondary pumps and through the release valve injection cavities of the cylinders, when this drain drainage of the hydraulic system connected to the first section of the tank through the hole of the retaining valve, common drain and the drain of the additional pump is connected to the sealed cavity of the main filter, and each section of the tank and the cavity of the filter have a locking valve for draining the working fluid.

The task can also be addressed due to the fact that forcing check valve suction cavities additional pump and pump control circuit, and feeding the cavities of the hydraulic cylinders are designed to ensure passage of the working fluid Ave, that the air shutter is made in the form of a slide valve or ball valve or solenoid valve with remote control.

And also due to the fact that in the first section completed hole, United through the pipeline and air shutter air cavity of the second section and is designed to replenish the amount of supercharging air of the second section, filtered through a filter-breather first section of the atmospheric air and the overflow of excess oil from the second section in the first.

And also due to the fact that the partition-dampers in the second section is configured to collect air bubbles and discharge them into the air cavity.

And also due to the fact that the sealed cavity of the main filter is divided into upper and lower compartments by a partition with a flange cover for the filter.

And also due to the fact that the upper compartment has a removable hatch seal for the dismantling of the filter tube with seal for air release and magnetic traps metal contamination and lower Bay - side flange sunroof seal for washing and cleaning of the filter.

And also due to the fact that the main filter sustain on the axis and on the flange of the cover through the spring pressure adjustment operation.

And also due to the fact that the top cover is placed an elastic check valve that prevents the washing away dirt from the internal cavity of the filter element during operation of the hydraulic system.

In Fig.1, 2 and 3 shows the tank working fluid of the hydraulic system.

In Fig.4 - make-up release valve.

In Fig.5 - suction release valve.

In Fig.6 - oil bolt.

In Fig.7 - retaining valve.

In Fig.8 is an airlock.

In Fig.9 - filter.

In Fig.10 - return valve.

In Fig.11 - check valve with diffuser flow.

Tank working fluid of the hydraulic system shown in Fig.1, 2 and 3, contains sections 1 and 2, separated by a sealed partition 3.

Section 1 has: a sealed hatch 4 in the bottom of the tank and through the suction dewatering valves 5 and 6 (Fig.5) is connected to the suction cavities additional pump and pump control circuit; air filter-breather 7, connecting it with the atmosphere; hole 8, blocked oil bolt 9 (Fig. 6) connected to the pipeline 10 with adjustable retaining valve 11 (Fig. 7) mounted on perelivom the second hole seccy the bolt 13 (Fig. 8), which are closed when the tank; a pipe 10 has a nipple 14 for connecting drain drainage of the hydraulic system.

Section 2 has: an air cavity; a sealed hatch 15 in the lower part; walls-dampers 16 (Fig.2) separating oil and air cavity on additional sections interconnected; built-in cavity 17 with a sealed hatch 25 at the entrance and sealed the hatch 26 at the output of the main filter (Fig.9) connected to the output main volume section 2 through the check valve 18 with the diffuser flow 19 (Fig.11); the oil stopper 20 connection through pipe 21 with the suction cavity of the main pump; a check valve 22 (Fig.10) connect the pressure cavities of the main pump, and the pump connection of the pressure cavity to the tank serves as a check valve 18; makeup release check valve 23 (Fig.4) recharge cavities of the hydraulic cylinders and hydraulic motors. All sections of the tank are clamping valves 24 for draining the working fluid. The hole 12 in the first section is connected through a pipeline and air shutter 13 with an air cavity sections 2 and is intended for the replenishment of the amount of supercharging air in section 2 filtered through a filter-breather section 1 of the atmospheric air. The hcpa is Izumi 29 and threaded end. The left end face of the valve is the valve, proterty to the edge of the hole of the housing. The linear movement of the valve is effected by a nut 30 with a flange which is clamped to the gap in the housing 27 of the flange 31. Linear is a longitudinal groove in the threaded part of the valve, which includes a retainer from turning special locking screw 32. Special nut 30 from turning now to the valve by a lock nut 33. Built-in partition 2, the sealed cavity 17 of the main filter (Fig.9) is divided into two sections - upper and lower, which are closed with airtight doors 25 and 26. Sunroof 25 serves for mounting and Dismounting of the filter, and the side 26 for cleaning the filter. Hatches have sealing rings 34 and 35. Main filter consists of a base flange of the cover 36 with a seal ring 44, the Central axis 37 of the top cover 38 and the bottom cover 39 of the mounting element 40 through the sealing rings 41, 42 and 43. The element with lids on the Central axis of the securing nuts 45 and 46, and the flange of the cover 36 through the spring 47, the thrust washer 48 and nut 49. Inside the hub cap 38 on the Central part has an elastic check valve 50. In the upper hatch 25 is installed tube 51 with Oplotnica oil from the hydraulic system and magnetic traps 54 metal contamination. Filter cleans the flow of the working fluid passing through the Central channels of the flange cover and the top cover mounting the filter element inside the filter and through it in the lower Bay. Elastic valve 50 prevents the washing away dirt from the internal cavity of the filter. A safety valve is the lower end of the flange of the cap and the upper face of the hub top cover of the filter element, which are adapting to each other. Pressure bypass is regulated by the spring 47. The tube 51 is designed to release air from the upper compartment. Partitions 16 in section 2, separating oil and air cavity at a separate section dampers are fluctuations in the fluid and perform the function of collecting on their surfaces small air bubbles, which are connected to each other, are displaced in the air cavity. Partitions are made with holes in the air cavity and retaining the pressure slows down the flow of air from one cavity to another and cause the volume of air in the sections to perform the function of the dampers, absorbing the sharp fluctuations in oil level, but provide good filling air in the absence of a retaining pressure. Make-up (Fig.4) and suction (Fig.5) squeeze clicks the mi 57 to the oil passage, seals 58, valve 59, the spring 60, the thrust washers 61, the locking ring 62, the pressure fitting 63 with the legs 64, the seal 65 and the mounting screws 66 attachment fitting to the body.

The work tank of the working fluid of the hydraulic system.

When installed on the machine and connected with the aggregates and nodes hydraulic tank its original refill is additional pump through the holes 52 and 53 in the input cavity of the main filter. Then through the main filter the working fluid fills the lower cavity of the filter and through the check valve 18 and the diffuser 19 is filled in the cavity section 2. When filling tank retaining valve 11, the oil stopper 9 and the air shutter 13 are open, and valves drain 24 in all sections are clamped. From the cavity section 2 the working fluid through the shutter 20 and the pipe 21 fills the suction cavity of the main pumps. Through holes 52 and 53, makeup release check valve 23 at the same time is filled with the hydraulic system of the machine. Reaching the level of the retaining valve, the working fluid fills the cavity section 1, and through the suction dewatering valves 5 and 6 suction cavity pump control and other pumps. Turns stopper in the top cover cukrownia air shutter 13 and refueling stops. Then in the retaining section of the remains of the upper part of the tank to the level of the airlock filled with air equal to the volume that you must have to ensure the required overpressure. The air shutter is closed, and the pump is connected to the intake working fluid from section 1 to one of the suction and return valves 5 or 6. Then pump the working fluid from the section 1 is pumped in section 2, and the pointer of the pressure backwater 68 is configured retaining the valve 11 at the required pressure value backwater. When this air cushion in section 2 is compressed. An additional pump is refueling the working fluid section 1 to the working level by overflow through the retaining valve. After that, the tank fluid is ready for operation hydraulic system.

During operation of the hydraulic system due to the difference of the volumes of the cavities of the cylinders there is a change in volume is drained into the tank fluid. This change is compensated by an additional pump for pumping the working fluid from section 1 to section 2. The excess working fluid flowing through the retaining valve in bestporno the cavity of the tank section 1.

As the air contacts the bone. Place air is the working fluid and there are shortages of working fluid at the inlet of the main pump, accompanied by increased noise, since the retaining pressure is created and maintained by the additional pump having a small capacity compared to the amount of fluid consumed by the main pump. In bestporno section 1 decreases the fluid level. It is necessary to restore normal operation of the main pumps, restore backwater in the tank by restoring volume of air. This is achieved by opening the air shutter 13 connecting the air cavity sections 1 and 2. This restores the fluid level in sections 1 through draining the working fluid from sections 2 and restores the volume of the air cushion in section 2 by entering through an air shutter air from section 1, connected through a filter-breather with the atmosphere. Then closes the air valve and the tank is ready for further work.

During operation, refueling tank working fluid is effected by switching on an additional pump, and restore volume air bag retaining cavity is reduced to an open operation, the recovery time, there are bubbles of air diffuser flow of the working fluid are ejected in total, where are deposited on the walls and wcreplays, up in the air cavity.

Depending on the repair highways hydraulic detach: the suction cavity of the main oil pump is blocked by the shutter 20, the pressure of the highways of the main pump is blocked check valve 22 (Fig. 10), the suction mains pump control circuit and additional blocked suction pull check valves 5 and 6 (Fig.5), mains feed cylinders is blocked makeup pressing return valve 23 (Fig.4), mains drainage drainage is blocked oil bolt 9. When disconnecting the mains drain fluid from the holes 52 and 53 is draining the working fluid from the upper cavity of the main filter is not more than 3-5% of the total volume in the tank. Thus, in the tank is maintained 95% or more of the total volume of the working fluid, which allows Assembly and disassembly in his car in a filled condition.

If necessary, drain the fluid from the tank opens one of the clamping valves 24, depending on operatyvumo section, and the tube 51, which improves the outflow from the retaining cavity and cavities of the main filter.

1. Tank Rabochy and check valves, air filter-breather, oil filter, suction holes, drain and drainage inlets, wherein the first section of the dewatering tank through check valve connected to the suction cavities additional pump and pump control circuit, through the air filter-breather with the atmosphere through an adjustable retaining valve with cavity fluid and air through the bolt with an air cavity of the second section, the second section baffles-dampers, has built a sealed cavity of the main filter chamber connected to the main volume of the second section through the check valve with diffuser flow, connected across is equipped with a shutter tube with suction cavity of the main pump through the check valves with pressure cavities of the primary and secondary pumps and through the release valve - injection cavities of the cylinders, thus draining the drainage of the hydraulic system connected to the first section of the tank through the hole of the retaining valve, common drain and the drain of the additional pump is connected to the sealed cavity of the main filter, and each section of the tank and the cavity of the filter have a locking valve for draining the working fluid.

2. Tank circuit, as well as feeding cavities of the hydraulic cylinders are designed to ensure the passage of the working fluid with the external connecting sleeve passageway overlap when removing the last.

3. Tank under item 1, characterized in that the air shutter is made in the form of a slide valve or ball valve or solenoid valve with remote control.

4. Tank under item 1, characterized in that the first section is made the hole, United through the pipeline and air shutter air cavity of the second section and is designed to replenish the amount of supercharging air of the second section is filtered through a filter-breather first section of the atmospheric air and the overflow of excess oil from the second section in the first.

5. Tank under item 1, characterized in that the partition-dampers in the second section is configured to collect air bubbles and discharge them into the air cavity.

6. Tank under item 1, wherein the sealed cavity of the main filter is divided into upper and lower compartments by a partition with a flange cover for the filter.

7. Tank under item 6, characterized in that the upper compartment has a removable hatch seal for de is lower compartment the side flange sunroof seal for washing and cleaning of the filter.

8. Tank under item 6, characterized in that the filter consists of a base flange of the cover, the filter element with top and bottom plates connected in a single unit, mounted on the axis and on the flange of the cover through the spring pressure adjustment operation.

9. Tank under item 8, characterized in that the top cover is placed an elastic check valve that prevents the washing away dirt from the internal cavity of the filter element during operation of the hydraulic system.

 

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